Pump jack



sept. 14 192e. 1,599,464

w. B.' FLYNN PUMP JACK Filed Dec. 19. 1925 gli ' ing blocks 12, whichPatented Sept. 14, 192.A

I UNITED STATES WILLIAM B. FLYNN, OF BEAUMOINT, TEXAS.

' PUMP JACK.

Application led December 19,` 1925. Serial No. 76,542.

'.Th-is invention relates to pump jacks and has for its object togenerally improve such constructions, as well as to provide a structureby which the power is applied in a direct line with the bore of thewell.

A further object of the invention consists in the provision of a pumpjack including a sprocket wheel composed of a ragmental disc whichprovides for the disposition 'of sectional weights within thecircumference of the disc.

Another object of the invention resides in an adjustment feature bywhich the stroke of the pump may be varied between wide limits.

Other objects and advantages of the in vention will be apparent from thefollowing description when taken in connection with the accompanyingdrawings; in which Figure 1 is a side elevation of the improved pumpjack in operative association with a well.- l

Figure 2 is a fragmentary vertical section taken on line 2-2 of Figure1.

Figure 3 is a section taken on line 3-3 ot Figure 1'; andA Figure 4 is adetail plan View of the chain to thesource of power.

Referring to the drawings in greater detail the numeral 1 indicates apair of base members which are formed of extensible sections 2 and 3which are rendered adjustable by means of the set screws 4. These basemembers 1 are placed above the well structurel and have pivoted to theends thereof as indicated by numeral 5 the upwardly inclined beams 6which are composed of the extensible sections 7 and 8 which may besecured in adjusted position by means of set screws 9. The beams 6 onthel adjacent ends of the base members 1 are connected by means of thehorizontally disposed rods 1() which `are adjustably attached to thebeams by means of set screws 11. Beartorm supports orthe bearings 13 ofthe gear wheel about to be described, are carried on the upper ends ofthe beams 6 as clearly disclosed on Figure 1 of the drawings. 4.

The wheel .14 which forms an essential' part o the invention maybe .madeof wood or other suitable material, and is in the form of a fragmentaldisc. In the present embodiment of the invention the osclllatng member14 is'sliown as rality of bolt holes 15 a provided with a plujj jacentits periphery for the reception `of bolts 16 which detach-4 The wellwith 'which the pump jack is connected is indicated by the numeral 18,

and the pump rod thereof is attached to 'one end of a chain 19, theopposite portion of the chain meshing with `the teeth of the segments`17and having its free end engaged over the hook 20`formed on the remoteend of the upper segment 17.

A partial counter-balance for the polish rod and related parts of thewell will of course increase the eiiiciency of operation of the pump andit is for the accommodation of these weights that the disc 14 is partlycut away. The sectional weights which are indicated by the numeral 21are sector-shaped and are provided with flanges 22 by which they may besecured to the disc or to each other by means of the bolts 23. Theseelements 21 havey their outer ends `rounded to conform to the contour ofthe disc 14 and it will be understood that their number may vide aYproper ratio between the weight of the pump apparatus and the weight ofthe counter-balance.

In a mechanism for operating a pump rod it is desirable that adjustmentsbe available whereby the stroke of the rod may be varied to` suit theparticular well. To this end I have provided the disc 14 with aplurality of bolt holes 24 whichl receive bolts 25 shown in Figure 2 andwhich rigidly clamp the toothed segments 26 to the opposite sides of thedisc 14. Onlyfa single segment 26 is attached t0 each side of the disc,and the .ends of the segments remote from the source of power areprovided with hooks 27 which receive the free ends of the doubleoperating chain 28, the adjacent portion of the chain meshing with teethof segment 26 and the associated with a source of power (not shown). Tovary the throw of the disc 14 and consequently the stroke of the pumprod it will be apparent that be varied' so as to prof' the segments"remote 4end thereof beingI Illu 26 may be moved tdwardor from theperiphery of the disc as may be necessary. To provide a furtheradjustment of the pump stroke especialIy where a very short stroke isnecessary, I have provided a pair of 'radially-extending bars 29 whichare fixed to opposite sides of the disc 14. These bars are provided withapertures 30 by meansy of which the chain 28 may be 'secured. Obviously,if the adjustments of the segment 26 are not suicient for the purpose athand then the chain` 28 may be moved beyond the periphery of the disc toany one of the adjustments 30.

Fromthe foregoing description taken in connection with the accompanyingdrawing it will be seen that the pump jack disclosed herein iscomparatively inex ensive in construction; ives a direct pul on thepolish rod.; provi for varying the weight of the counterbalance; andthat the segment 26 and radiallyextending bars 29' permit an adjustmentof the powerfstroke 'between wide limits.`

In accordance with the patent statutes I have described what I nowbelieve to' be the best embodiment of the invention; but I do not wishto be understood thereby as limiting myself or the scope of theinvention,

as many changes and modifications may be made without departing from thespirit of the invention; all such I aim to include in the scope of theappended claims.

WhatI claim as new and desire to secure by Letters Patent is: v1. A pumpjack` for wells including a es a compact and eiiicient means wheelsupported over a well, said wheel comprising a fragmental disc,aplurality of sectional weights detachably mounted in the cut-outportion of said disc, and means op eratively connecting said ywheel withthe well pump. v

2. A pump jack for wells including a Wheel supported over a well, ,saidwheel comv prlsing a ragmental disc, a plurality of sectional weightsdetachably mounted in the cut-out portion of -said disc, toothedsegments detachably secured to the rim of said fragmental disc, and achain connected to the well pump and in mesh with the teeth of saidsegments.

3. A pump jack for wells including a Wheel rotatably mounted over awell, means operatively connecting said wheel with the Well pump, a.radiall adjustable toothed segment mounted. ontlsie wheel, a chainengaging said toothed segment and connected to a source of power, and aradially-extending bar extending beyond-the periphery of said wheel andformigng an additional anchoring means for said chain.

4. A pump jack for Wells including a wheel rotatably mounted over awell, means operatively connecting said wheel with the well pump, aradially vad'ustable toothed segment mounted on the w eel, a chainengagil'ig said toothed segment and connected.

and a radially-exto a source of power, tending apertured bar extendingbeyond the periphery of said wheel and forming an addltional anchoringmeans for said chain.

W. 1 3. FLYNN.

